Regarding the availability of the support, it depends on which type of subscription you're using. You can check out this article for our contact information. Click on the QuickBooks Online (QBO) drop-down to see the most updated support schedule: Support hours and types.
Here's how you can reach us:
Go to the Help menu at the upper right.
Enter your concern.
Click Let’s talk.
Choose Get a callback.
Type in your contact info.
Select Confirm my call.
The Community will always have your back if you need anything else in running your business in QuickBooks Online. Have a good one.